How is bacillary angiomatosis manifested in cat scratch disease (CSD)?

Updated: Feb 16, 2021
  • Author: Robert A Schwartz, MD, MPH; Chief Editor: Michael Stuart Bronze, MD  more...
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Bacillary angiomatosis almost exclusively occurs in patients who are immunocompromised. Skin lesions consisting of numerous brown to violaceous or colorless vascular tumors of the skin and the subcutaneous tissue are the most common manifestation. Disseminated disease may involve bone, liver, spleen, lymph nodes, the gastrointestinal and respiratory tracts, and bone marrow.

B henselae and Bartonella quintana have been isolated from samples of cutaneous and osseous bacillary angiomatosis lesions. Histologic examination with Warthin-Starry staining reveals vascular proliferation with numerous bacillary organisms.

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